DIYgraphical software for your microcontroller projects.
Solve your own DNA mysteries with gel electrophoresis.
Bring your projects into the 21st century with a touch screen display.
Do your own designs with a little direction.
Make breadboarding with the Arduino Uno more robust and trouble-free.
Build a UV sanitizer from a UV LED panel and a small reflective enclosure.
Self-contained volt/amp meter that displays the values on a webpage via a Raspberry Pi.
Whether you own or intend to build/buy a CNC router, make it a habit to routinely check for backlash.
Make your ham life easier with a PC controlled antenna switch.
Take an in-depth look at the Propeller FLiP board from Parallax.
Take a look back at how the serious study of radio waves was launched.
A mini tutorial on how to build your own modular synthesizer system.
A fun historical look at how radio broadcasts promoted the game of Bridge.
Variations and suggestions for building discrete-logic clocks.
Learn how software utilizes libraries, and how you can create your own.
Learn basic theory on the decibel and build an affordable RF power meter at the same time.
Take a look at how this highly configurable and stable monitoring system works.
Take advantage of C preprocessor operations.
Work with a spectrophotometer using E Coli.
Take a look at five synthesis building blocks.
Have multiple functions running in your sketch at the same time.
#2 in a series of DIY Biotech articles.
New projects for Mentor’s Friend retro computer owners to explore programming and hardware interfacing with.
Learn a simple numerical method that is intuitive and solves many complex circuit problems with just a few lines of code.
These design ideas for voltage dividers really add up.
Get flashy with your troubleshooting methods.
Using light bulbs to limit current.
Bored with two-dimensional circuit layouts? Here’s a way to jazz it up.
Explore Bluetooth using the Amigo breadboard and Color BASIC serial interface.
Review of a surprisingly simple yet powerful audio filter kit.
Refurbishing the “Big Kahuna” of Heathkits.
There’s no excuse for not learning how to program microcontrollers.
Use this free software tool to gain oscilloscope skills, analyze audio signals, and measure digital signals.
Learn how to program microcontrollers.
Learn how to create and parse JSON messages.
Build a live webcam using the ESP8266 and an Android phone.
Modify E. coli bacteria to produce proteins of your choice.
Tutorial on including touch screens into your homebrew projects.
Tutorial on including touch screens into your homebrew projects.
Explore concepts such as energy density and negative pressure as it relates to our universe.
Review of the Morserino-32 CW Trainer.
A journey through the history that led to the most important invention of the 20th century.
Back in the 1920s, the penny postcard quickly became the preferred medium by broadcast radio stations for listener reports.
A fun spin on the classic falling body experiment to measure the acceleration of gravity.
How do you go about building on a protoboard? Here’s how.
Improving on my previous Internet Digital Clock
Adventures with two cores and the ESP32
Customizing a thermostat for a simple forced air heating/cooling system.
Time to build this digital clock that connects via Wi-Fi to the Internet to not only display the usual time, date, temperature, and humidity, but to also be able to retrieve things from the Internet like the weather or weather forecast and stock market reports as well.
While most voltage references only generate a single voltage, this design offers variable voltage from zero to 10 volts.
Make a retro PC that fits in an Altoids tin.
Customize pencils for friends and family.
This project joins an Arduino CPU, some temperature/humidity sensors, and a real time clock (RTC) module to a large (3.5 inch) high-resolution color LCD graphics display to create a fun and useful graphing thermometer.
Construct this elegant and intricate timepiece.
This general-purpose test instrument is invaluable in troubleshooting.
Create “light graffiti” with this fun project.
This unique musical gadget makes learning how to write fun!
Choose from three different headphone amps to suit your needs.
This RF buffer is a handy tool you’ll remember every time you use a frequency counter.
Use this device for testing that costs less than $5 to make.
Keep up with your pet with this homemade tracker.
Make this mini vacuum you can take anywhere.
Creating a Telecoil installation for your home.
Always be sure you have enough filament for your print job with the Spool-Scale!
A utility supply like this has a small footprint on the bench and supports a wide range of experiments with tube circuits.
Build your own levitation device.
You’ll be “alarmed” at all the cool features this unit has!
With a little amount of expertise in electronics, there are many accessories we can build ourselves to add to our slot car racing hobby.
The Ham’s Wireless Workbench
by H. Ward Silver
Rotators
The rotator is worth installing carefully and being treated with care. After all, your ham radio success turns on them!
The Ham’s Wireless Workbench
by H. Ward Silver
The Smith Chart
Unravel the mysteries of transmission lines with this unique chart.
Open Communication
by Louis E. Frenzel
Dirt Cheap Wireless Control
Have some fun experimenting with the wireless modules available out there for short-range applications.
Q&A
by Kristen McIntyre
Electronics Q&A (01.2019)
Read about girding for battle, battle language, who needs wires, and adrift in time.
Q&A
by Kristen McIntyre
Electronics Q&A (02.2019)
Questions on “firebottle” (tube) gain and attenuating calculations.
Q&A
by Kristen McIntyre
Electronics Q&A (03.2019)
Questions on turn-signal light bulb flashing rates, specs on ignition cell batteries, and version control systems.
Near Space
by L. Paul Verhage
Cosmic Rays Redux
All about muons and the detector I used to measure their flux.
Open Communication
by Louis E. Frenzel
Waiting for 5G Wireless
A status report on 5G to bring you up to speed.
Open Communication
by Louis E. Frenzel
Whatever Happened to these Wireless Technologies?
A list of “forgotten” standards and services.
Open Communication
by Louis E. Frenzel
IoT Made Easy
It’s getting easier than ever to make your own stuff to connect to the Internet via IoT.
New Products (01.2019)
SBC TS-7180 in Engineering Sampling, New Generation of Value Instruments, Real Time Streaming.
New Products (02.2019)
Modern Build System, Series of Spectrum Analyzers, Compact Isolation Transformer.
New Products (03.2019)
TC Measurement Hat for Pi, PC Controlled Antenna Tuners, Hands-Free Voltmeter, 3 Series MDO and 4 Series MSO, Package Pricing Basic Test Equipment, No Assembly Fees on Five PCBs, RPi Enclosure with Touchscreen, 4 mm Inline Fuse Adapter.
New Products (05.2019)
Digital Microscope, Radiometrix LoRa, Multi-Channel Transceiver, 8 mm REX Pinion Gears, 5 mm HTD Timing Belts.
New Products (06.2019)
Icon-Based Data Acquisition Software, Mini AC Dual Balance Charger, Dual Mode Servo, Hyper Coupler, Ball Bearing Carriage, Multiple RPM Support, FPGA/SOC Dev Board, H-Bridge Motor Control, Battery-Powered Portable O'scopes.
The Ergonomics of Learning
by Bryan Bergeron
Having the right tools for different people.
How to Learn CW
by Bryan Bergeron
There is merit in learning and using CW, and it’s more convenient than ever.
RIP: Terrestrial AM Radio
by Bryan Bergeron
Routines and methods are changing in how folks get their news and music delivered.
The Challenging Life of Urban Hams
by Bryan Bergeron
Being an amateur radio operator within city limits can be a hassle.
Death, Taxes, and Exposure to Electromagnetic Radiation
by Bryan Bergeron
Use common sense when it comes to EMR exposure.
Respiratory Masks
by Bryan Bergeron
Respiratory masks should always be part of your safety tool arsenal.
Reader Feedback (01.2019)
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Reader Feedback (05.2019)
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Reader Feedback (06.2019)
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